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Product Warranties | 12 Months Ended
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Sep. 30, 2021
Product Warranties |
Product Warranties | 11. Product Warranties Product warranty activity for the year ended September 30 2021 and 2020 was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
​ | ​ | (Amounts in thousands)
Balance at the beginning of the period | ​ | $ | 78 | ​ | $ | 105
Accruals for warranties for products sold in the period | ​ |  | 13 | ​ |  | 7
Fulfillment of warranty obligations | ​ |  | (24) | ​ |  | (34)
Balance at the end of the period | ​ | $ | 67 | ​ | $ | 78
​ ​ ​ These amounts are within Accounts payable and accrued expenses on the Consolidated Balance Sheets.

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- Definition The entire disclosure for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -URI http://asc.fasb.org/topic&trid=2155896 + Details
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